Diaphragm valve



June 16, l 925.

` F. HoRAw DIAPHRAGM VALVE Filed May 1'8, 1923 Patented June 16, 1925.'

PATENT oFFlcE.

IERNK lHOIR'AWA, 0F DETROIT, MICHIGAN.

rnmjrmmen v'A'LvE.v

To all tvlwm it mag/concern.' Y

Be it known that I, FRANK HORAWA, a

Vcitizen of the United States of America, ref,siding at Detroit, in the county vof Wayne and Stateof Michigan, have invented certain new and usefulImprovements in Diaphragm Valves, of which the following is a specification, reference being had therein to the accompanying drawings.

apparatus including ,a compressor, al con? This invention relates to a refrigeratory denser coil, and an expansion coil, and has pansible gases from re-entering the con-4 special reference to a diaphragm valve interposed between the expansioncoil andthe condenser coil to prevent gaseous sulphur dioxide, anhydrous ammonia, or other exdenser coil should there bey a cessation in the y operation of the' compressor or a back pressure in the expansion coil. i

One of the objects of my inventlon is to provide a diaphragm valve for accomplishing the above result wherein vthe combined' action of a spring and gas pressure against a diaphragm will close the'valve against the action of the spring which maintains the valve open under normal conditions, and the expanslve force of the last mentioned spring is adapted to open the valve when the pressure is reduced within the expansion coil, and normal operating conditions established in connection with the compressor..

A. further object of this invention is to provide a simple, durable and inexpensive valve of theabove type with a filter, baffle or liquid retardation f element which 'precludes or reduces to a minimum chances of liquid flowing through the Vvalve expansion coil from ,the condenser.

The above and other objects are attained by a construction that will be hereinafter described and then claimed, and reference will now be had to the drawing, wherein Figure 1 is a vertical sectional view of the valve;

Fig. 2 is a horizontal sectional view taken .on the line II--II of Fig. 1, and

Fig. 3 is a diagrammatic view of the re frigeratory apparatus showing the location of the valve.

In .the drawin the reference numeral 1 Vdenotes a cylindrical valve body having one end thereof provided with an` exteriorly screwthreaded head 2 and in the end of said ead is a conical shaped diaphragm chamber 3 with an aperturedboss 4 centrally `Application led May 18, T923. Serial No. 639,759.

into the thereof. At the juncture ofthe body `1 and the head 2 is a side enlargement 5 provided with an outlet connection 6 communicating with the diaphragm chamber 3 by an angularly disposed passage 7. The outlet' .connectlon 6 is adapted to be" connected to an expansion coil 8 forming part of the refrigeratory apparatus including aconventional -form of driven compressor 9 connected by a pipe 10 toaJ condenser coil 11 which in turn is connected by a pipe 12 to an inlet connection l13 detachably mounted in the body 1, said inlet connection being in the form of a coupllng or plug screwed into the valve body 1.

Mounted against the end of the head 2 is a circumferentially corrugated diaphragm 14 l1eld in place by a cap 15 screwed on the head 2, said cap having a central interiorly screwthreaded boss 16 for a spring retaining nut or member 17 `in which is mounted a coiled expansion spring 18. This spring bears against the diaphragm 14 and the expansive force of said spring is overcome` when the diaphragm 14 is flexed towards the capA 15 by back pressure within the diaphragm chamber 3.

Axially of the valve body 1 is a bore19 which has one end thereof tapered to communicate with theapertured boss 4 and provide a seat 20 for the conical end 21` of a member 22 slidable in the bore 19. The conical end 21 of the member 22 has a stem 23 extending through the apertured boss 4 andconnected to the central portion of the diaphragm 14 so that the conical member 22 and the 'diaphragm 14 may move in synchronism.

Detachably mounted in the bore 19 is a screw plug 24 and between said screw plug and the conical member 22 is a coiled expansion spring25 of less expansive force TES than the coiled spring 18 and the expansive i force of vthe spring 25 cooperates with back .pressure in the diaphragm. chamber 3 in overcoming the pressure of the spring 18 so that the diaphragm 14 may be flexed and the conical member 22 closed.,

AtA the side ofthe bore 19 there'is a bypath 26 disposed parallel to the bore and establishing communication between the seat or conical endof the bore and the outer end of the valve .body 1.

In the outer .end of the' valve body 1, between the inlet connection 13 and the screw plug 24 'is-fan annular seat or fiange 27'- for an atomizing baffle, screen or liquid retardation lnember, preferably in the form ot' a perforated washer 28, a cage 29 and a body of i'elt or other pervious material 30 betweenthe cage and washer, said cage being retained on the washer and said washer on the flange 27 by the expansive force of the spring 31 between the cage 29 andthe inlet connection 13.

Any liquid entering the outer end of the valve body l from the condenser coil l1 is held in suspenseby the baiile and atomized betore passing into the by-path 26, through the conical end of the bore 19 and the apertured boss '-l into thev diaphragm chamber 3, from where it passes through the passage 7 and outlet connection 6 to the expansion coil It is thought that the operation and utility of my valve will be apparent without further deseription, and while in the drawing there is illustrated a preferred embodiment of my invention it is to be understood that the structural elements are susceptible to such changes fall Within the scope of the appended claim.

vhat I claim is A valve of the type described comprising a valve body having a diaphragm chamber and inlet and outlet connections, a diaphragm in said chamber, and a conical member between the inlet connection and chamber of said valve body and slidable axially of said body, said conical member being conneeted to said diaphragm and held normally open thereby, and said valve body having a by-path leading to the conical portion of said conical member.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK HORAVVA.

Yitnesses KARL H. BUTLER, ANNA M. DoRR. 

